Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2cc7e50231fff3…

MALICIOUS

PDF

82.3 KB Created: 2021-09-03 18:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4b5d637a7d322c635c46f6a3158edb38 SHA-1: 8840abb41372b6e2eef77b3967c3a06c781713a2 SHA-256: ce2cc7e50231fff31eec8f8e4b4bf4775a8ad6d9a56ea862ef7b26017e8d5e4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging a technique consistent with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/09e9400d620393366f070f2a46d3a07b/fovilikoxe.pdf In PDF document text
    • http://jyotiacademicpress.org/uploads/file/16181801205.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/75074695357.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/40514120586.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/wuzofajaxurer.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/1541db81a14fc139cc7b300de796fc06/pukakelajananamexekegusu.pdfIn PDF document text
    • http://gotween.com/userfiles/file///77199129812.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210701_19D1BD0508F6F3B4.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d89cec77b---xejibepojiju.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/36066877519.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e106a54a2---57221794190.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/wawekasarasosezomodip.pdfIn PDF document text
    • https://tosto.cl/ckfinder/userfiles/files/11608474149.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/jcleppt99lc6m4kg6kgj8sspe8/36896784800.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/nakiwobawupuvaxeza.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbfe1cf0ed---91753883189.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946cf144c03---20524474184.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/9132604140.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/17663862963.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/160793cbaa0b8d---vulunalavugujetuketes.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/kikazup.pdfIn PDF document text
    • http://unstitchedfootwear.net/files/file/xobexizuduvixomagaki.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/32333111416.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=ramas+del+derecho+administrativo+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FA 18508 bytes
SHA-256: e14f5c13c47804e019c11bbbb5676b318adb542eab29822b3ebb09bca1acba48
font_01_sfnt_off000108ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12101 10996 bytes
SHA-256: 18e3ca889572c276ebf2cb086202fc5f624dc9b98d9fce98d1939dba7329962b

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